Driving down the road and out of the blue my rpm shoots almost to the red and felt like it had the hiccups. got to work and had the guys to put it on the computer and its giving a power up at speed code . this has been going on for long enough. sometime the check engine comes on and sometimes it don't. when it does this it scares me and my children . nobody is sure what the powering up at speed means and what part will fix it. *tr